1. Identify the motherboard
The model name on the lid is only a starting point: one laptop model can ship with several motherboard designs. Look for the identifier printed on the PCB itself:
| Marking | Example | Used by |
|---|---|---|
| Compal LA- | LA-K411P | Dell, Lenovo, HP, Acer, Toshiba |
| LCFC NM- | NM-A311 | Lenovo |
| Quanta DA0 | DA0ZAWMB8E0 | HP, Acer, Dell, ASUS |
| Inventec 6050A | 6050A2466401 | HP, Toshiba |
| Wistron 5-digit | 17541-1 | Dell, Lenovo, HP, Acer |
| Apple 820- | 820-00840 | MacBook, iMac, iPhone |
| Samsung BA41- | BA41-02468A | Samsung notebooks |
| Model code | X541UV, GA-H61M-DS2 | ASUS laptops, desktop boards |
Record the whole marking including its suffix, and look nearby for the revision, such as REV 1.0 or A00. Do not substitute the FRU sticker or a component part number for the PCB identifier.
2. Choose the file type
| File type | What it helps with | What to check |
|---|---|---|
| BIOS dump | Firmware in the SPI flash chip (BIOS, EC, ME) | Board revision, flash size, CPU and GPU configuration |
| Schematic | Power rails, signals and component connections | Board number and document revision |
| Boardview | Component positions, pins and nets | PCB revision and a viewer that supports the format |
| Datasheet | Pinouts and ratings of individual chips | Exact part marking and package |
An archive can contain more than one kind of file. The library assigns one primary type from the filename and source description, so check the archive contents at the source.
3. Search the board number
Use the search box on any page. Spaces, hyphens and underscores are ignored, so LA-B111P, LA B111P and lab111p find the same files. The suggestions under the search box also list matching board numbers, brands and series.
You can add a brand, series or file type to the query: T480 schematic, Latitude 5480 bios or dell boardview 19746. Text search tolerates small spelling mistakes in longer words, but numbers are matched exactly: one different digit can mean different hardware.
4. Compare the results
Filter by brand, device, file type and format, and sort by date, name, board number or size. The list scrolls continuously. Each row shows a readable title (hover it for the original filename), the detected brand and series, the board number and the file type. Size and date are reference points, not evidence of compatibility.
5. Verify before writing firmware
Confirm the board revision, flash-chip capacity and hardware configuration (integrated or discrete graphics, CPU family). Read the original chip at least twice and keep the backup: it contains the serial number, MAC address, licence keys and calibration data of your board. Claims such as “tested” or “100% working” come from uploaders and are not verified by Mc-Chevalier.
6. When a file is missing
Search the whole library with a short, distinctive part of the board number. Browse brands and series or filter the library by device. Files without enough information stay in Unidentified boards. The library is a snapshot of source metadata, and individual source posts can be removed by their owners.